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1、BRITISH STANDARD BS EN ISO 4892-3:2006 Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps The European Standard EN ISO 4892-3:2006 has the status of a British Standard ICS 83.080.01 ? BS EN ISO 4892-3:2006 This British Standard was published under the authority of
2、the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006 ISBN 0 580 48401 7 National foreword This British Standard is the official English language version of EN ISO 4892-3:2006. It is identical with ISO 4892-3:2006. It supersedes BS EN ISO 4892-3:2000 which is withdrawn. The UK partici
3、pation in its preparation was entrusted to Technical Committee PRI/21, Testing of plastics, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or Euro
4、pean publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include a
5、ll the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries
6、on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the I
7、SO title page, pages ii to iv, pages 1 to 14, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 489
8、2-3 February 2006 ICS 83.080.01Supersedes EN ISO 4892-3:1999 English Version Plastics - Methods of exposure to laboratory light sources - Part 3: Fluorescent UV lamps (ISO 4892-3:2006) Plastiques - Mthodes dexposition des sources lumineuses de laboratoire - Partie 3: Lampes fluorescentes UV (ISO 489
9、2-3:2006) Kunststoffe - Knstliches Bestrahlen oder Bewittern in Gerten - Teil 3: UV-Leuchtstofflampenstrahlung (ISO 4892-3:2006) This European Standard was approved by CEN on 6 February 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
10、 giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official
11、versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgi
12、um, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZ
13、ATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4892-3:2006: E Foreword This document (EN ISO 4892-3
14、:2006) has been prepared by Technical Committee ISO/TC 61 “Plastics“ in collaboration with Technical Committee CEN/TC 249 “Plastics“, the secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by end
15、orsement, at the latest by August 2006, and conflicting national standards shall be withdrawn at the latest by August 2006. This document supersedes EN ISO 4892-3:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to imp
16、lement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and Unit
17、ed Kingdom. Endorsement notice The text of ISO 4892-3:2006 has been approved by CEN as EN ISO 4892-3:2006 without any modifications. EN ISO 4892-3:2006 Reference number ISO 4892-3:2006(E) INTERNATIONAL STANDARD ISO 4892-3 Second edition 2006-02-15 Plastics Methods of exposure to laboratory light sou
18、rces Part 3: Fluorescent UV lamps Plastiques Mthodes dexposition des sources lumineuses de laboratoire Partie 3: Lampes fluorescentes UV EN ISO 4892-3:2006 ii iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Principle. 1 4 Apparatus 2 4.1 Laboratory light source 2 4.2 Test chamb
19、er. 5 4.3 Radiometer 5 4.4 Black-standard/black-panel thermometer 5 4.5 Wetting and humidity . 5 4.6 Specimen holders. 6 4.7 Apparatus to assess changes in properties 6 5 Test specimens. 6 6 Test conditions . 6 6.1 Radiation 6 6.2 Temperature 6 6.3 Relative humidity of chamber air 7 6.4 Condensation
20、 and spray cycles 7 6.5 Cycles with dark periods . 7 6.6 Sets of exposure conditions 7 7 Procedure 8 7.1 General. 8 7.2 Mounting the test specimens 8 7.3 Exposure 9 7.4 Measurement of radiant exposure 9 7.5 Determination of changes in properties after exposure. 9 8 Exposure report 9 Annex A (informa
21、tive) Spectral distribution of radiation for typical fluorescent UV lamps. 10 Bibliography. 14 EN ISO 4892-3:2006 iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Stand
22、ards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also ta
23、ke part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees i
24、s to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibili
25、ty that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 4892-3 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 6, Ageing, chemical and environmental resistance. Th
26、is second edition cancels and replaces the first edition (ISO 4892-3:1994), which has been technically revised. ISO 4892 consists of the following parts, under the general title Plastics Methods of exposure to laboratory light sources: Part 1: General guidance Part 2: Xenon-arc lamps Part 3: Fluores
27、cent UV lamps Part 4: Open-flame carbon-arc lamps EN ISO 4892-3:2006 1 Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps 1 Scope This part of ISO 4892 specifies methods for exposing specimens to fluorescent UV radiation, heat and water in apparatus designed to rep
28、roduce the weathering effects that occur when materials are exposed in actual end-use environments to daylight, or to daylight through window glass. The specimens are exposed to fluorescent UV lamps under controlled environmental conditions (temperature, humidity and/or water). Different types of fl
29、uorescent UV lamp may be used to meet all the requirements for testing different materials. Specimen preparation and evaluation of the results are covered in other ISO documents for specific materials. General guidance is given in ISO 4892-1. NOTE Fluorescent UV lamp exposures for paints, varnishes
30、and other coatings are described in ISO 115074. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any
31、 amendments) applies. ISO 4582, Plastics Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources ISO 4892-1, Plastics Methods of exposure to laboratory light sources Part 1: General guidance 3 Principle 3.
32、1 Fluorescent UV lamps, when properly maintained, can be used to simulate the spectral irradiance of daylight in the ultraviolet (UV) region of the spectrum. 3.2 Specimens are exposed to various levels of UV radiation, heat and moisture (see 3.4) under controlled environmental conditions. 3.3 The ex
33、posure conditions may be varied by selection of: a) The type of fluorescent lamp. b) The irradiance level. c) The temperature during the light exposure. EN ISO 4892-3:2006 2 d) The relative humidity of the chamber air during the light and dark exposures, when test conditions requiring control of hum
34、idity are used. NOTE Commercial fluorescent UV devices usually do not provide means of relative humidity control. e) The type of wetting (see 3.4). f) The wetting temperature and cycle. g) The timing of the light/dark cycle. 3.4 Wetting is usually produced by condensation of water vapour onto the ex
35、posed specimen surface or by spraying the test specimens with demineralized/deionized water. 3.5 The procedure(s) may include measurement of the irradiance and the radiant exposure in the plane of the specimen. 3.6 It is recommended that a similar material of known performance (a control) be exposed
36、 simultaneously with the test specimens to provide a standard for comparative purposes. 3.7 Intercomparison of results obtained from specimens exposed in different apparatus or to different types of lamp should not be made unless an appropriate statistical relationship has been established between t
37、he different types of equipment for the material to be tested. 4 Apparatus 4.1 Laboratory light source 4.1.1 Fluorescent UV lamps are fluorescent lamps in which radiant emission in the ultraviolet region of the spectrum, i.e. below 400 nm, makes up at least 80 % of the total light output. There are
38、three types of fluorescent UV lamp used in this part of ISO 4892: Type 1A (UVA-340) fluorescent UV lamp: These lamps have a radiant emission below 300 nm of less than 2 % of the total light output, have an emission peak at 343 nm, and are more commonly identified as UVA-340 for simulation of dayligh
39、t from 300 nm to 340 nm (see Table 1, column A.1). Figure A.1 of Annex A is a graph of spectral irradiance from 250 nm to 400 nm of a typical type 1A (UVA-340) fluorescent lamp compared to daylight. If specified and agreed upon by all parties, a combination of fluorescent UVA lamps may also be used
40、(see Table 1, column A.2). When combinations of lamps with different spectral emissions are used, provision shall be made to ensure the uniformity of the spectral irradiance at the surface of the specimens, e.g. by continuous repositioning of the specimens around the lamp array. Type 1B (UVA-351) fl
41、uorescent UV lamp: These lamps have a radiant emission below 300 nm of less than 2 % of the total light output, have a peak emission at 353 nm, and are more commonly identified as UVA-351 for simulation of the UV portion of daylight behind window glass (see Table 2). Figure A.2 of Annex A is a graph
42、 of spectral irradiance from 250 nm to 400 nm of a typical type 1B (UVA-351) fluorescent UV lamp compared to daylight filtered by window glass. Type 2 (UVB-313) fluorescent UV lamp: These lamps are more commonly identified as UVB-313 and have a radiant emission below 300 nm that is more than 10 % of
43、 the total output and a peak emission at 313 nm (see Table 3). Figure A.3 of Annex A is a graph of the spectral irradiance from 250 nm to 400 nm of two typical type 2 (UVB-313) fluorescent lamps compared to daylight. Type 2 (UVB-313) lamps may be used only by agreement between the parties concerned.
44、 Such agreement shall be stated in the test report. NOTE 1 Type 2 (UVB-313) lamps have a spectral distribution of radiation which peaks near the 313 nm mercury line and may emit radiation down to = 254 nm, which can initiate ageing processes that never occur in end-use environments. NOTE 2 The solar
45、 spectral irradiance for a number of different atmospheric conditions is described in CIE Publication No. 851. The benchmark daylight used in this part of ISO 4892 is from Table 4 in CIE Publication No. 85:1989. EN ISO 4892-3:2006 3 4.1.2 Unless otherwise specified, type 1A (UVA-340) fluorescent UV
46、lamps or corresponding type 1A fluorescent UV lamp combinations shall be used to simulate the UV part of daylight (see Table 4, method A). Unless otherwise specified, type 1B (UVA-351) lamps shall be used to simulate the UV part of daylight through window glass (see Table 4, method B). 4.1.3 Fluores
47、cent lamps age significantly with extended use. If an automatic irradiance control system is not used, follow the apparatus manufacturers instructions on the procedure necessary to maintain the desired irradiance. 4.1.4 Irradiance uniformity shall be in accordance with the requirements specified in
48、ISO 4892-1. Requirements for periodic repositioning of specimens when irradiance within the exposure area is less than 90 % of the peak irradiance are described in ISO 4892-1. Table 1 Relative ultraviolet spectral irradiance for type 1A lamps for daylight UV (method A) a, b Type 1A (UVA-340) lamp A.
49、1 Type 1A lamp combination A.2 Spectral passband ( = wavelength in nm) Minimum c % CIE No. 85:1989, Table 4 d,e % Maximum c % Minimum c % CIE No. 85:1989, Table 4 d,e % Maximum c % 290 0 0,01 0 0 290 u u 320 5,9 5,4 9,3 4 5,4 7 320 u 360 60,9 38,2 65,5 48 38,2 56 360 u 400 26,5 56,4 32,8 38 56,4 46 a This table gives the irradiance in the given passband, expressed as a percentage of the total irradiance between 290 nm and 400 nm. To determin